50
Troubleshooting
Is a connected port Network Port Link Status LED off?
Is the power supply Input Power Source LED off?
Is the power supply Voltage/Fan Fault/Service Required LED amber?
Controller failure
Cache memory is flushed to CompactFlash in the case of a controller failure or power loss. During the write to
CompactFlash process, only the components needed to write the cache to the CompactFlash are powered by the
supercapacitor. This process typically takes 60 seconds per 1 Gbyte of cache. After the cache is copied to CompactFlash,
the remaining power left in the supercapacitor is used to refresh the cache memory. While the cache is being maintained
by the supercapacitor, the Cache Status LED flashes at a rate of 1/10 second on and 9/10 second off.
IMPORTANT:
Transportable cache only applies to single-controller configurations. In dual controller configurations,
there is no need to transport cache from a failed controller to a replacement controller because the cache is duplicated
between the peer controllers (subject to volume write optimization setting).
Table 13
Diagnostics LED status: Rear panel “Network Port Link Status”
Answer
Possible reasons
Actions
No
System functioning properly.
No action required.
Yes
The link is down.
Use standard networking troubleshooting procedures to isolate faults on
the network.
Table 14
Diagnostics LED status: Rear panel power supply “Input Power Source”
Answer
Possible reasons
Actions
No
System functioning properly.
No action required.
Yes
The power supply is not receiving
adequate power.
•
Verify that the power cord is properly connected and check the
power source to which it connects.
•
Check that the power supply FRU is firmly locked into position.
•
In the SMU, check the event log for specific information regarding the
fault. Follow any Recommended Actions.
•
If the above action does not resolve the fault, isolate the fault, and
contact an authorized service provider for assistance.
Table 15
Diagnostics LED status: Rear panel power supply: “Voltage/Fan Fault/Service Required”
Answer
Possible reasons
Actions
No
System functioning properly.
No action required.
Yes
The power supply unit or a fan is
operating at an unacceptable
voltage/RPM level, or has failed.
When isolating faults in the power supply, remember that the fans in both
modules receive power through a common bus on the midplane, so if a
power supply unit fails, the fans continue to operate normally.
•
Check that the power supply FRU is firmly locked into position.
•
Check that the power cable is connected to a power source.
•
Check that the power cable is connected to the power supply module.